Security vulnerabilities have been discovered in third-party TYPO3 extensions: MM DAM - FEFileList (mm_dam_filelist), Events (julle_events), WEC Staff Directory (wec_staffdirectory), TGM news (tgm_news), TGM media (tgm_media), TGM calendar module (tgm_cal), DAM Lightbox (damlightbox), Download system (sb_downloader), iwbase (iwbase), Fussballtippspiel (toto), Font resizer (fontsizer), Adminer (t3adminer)
For further information on all CSB (Collective Security Bulletin) issues, please read the related advisory TYPO3-EXT-SA-2011-006 that was published today:
http://typo3.org/teams/security/security-bulletins/typo3-extensions/typo3-ext-sa-2011-006/
In general the TYPO3 Security Team recommends to read the following pages:
The TYPO3 Security Cookbook:
http://typo3.org/fileadmin/security-team/typo3_security_cookbook_v-0.5.pdf
Make sure you are subscribed to the TYPO3 Announce List:
http://lists.typo3.org/cgi-bin/mailman/listinfo/typo3-announce
See all TYPO3 security advisories:
http://typo3.org/teams/security/security-bulletins/